Check Engine Light On - Hyundai Elantra 2019
The check engine light is illuminated on a 2019 Hyundai Elantra with no other noticeable symptoms. This typically indicates a minor emissions or sensor issue, but it requires diagnostic scanning to identify the specific fault.
Diagnosis Details
Possible Causes
Loose or faulty gas cap causing evaporative emissions leak
Oxygen sensor malfunction or degradation
Catalytic converter efficiency below threshold
Related OBD-II Codes
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What You Should Do
Check and tighten the gas cap first.
If the light remains on, have the vehicle's OBD-II system scanned for trouble codes at an auto parts store or repair shop.
Address the specific code found.
Estimated Repair Cost
$0 (gas cap check) to $150-$300 for diagnostic and minor sensor replacement
Typical range: $150 – $300
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.